180 limnjEADvE. 



below, usually white. Outer lip subarcuated, not promi- 

 nent, not disposed to expand except at the anterior extre- 

 mity, often thickened by a callus at a little distance from 

 its edge, which latter is not sinuated. Pillar lip narrowly 

 reflected, more or less curved ; labial enamel usually 

 appressed in the adult, but often exposing an umbilical 

 chink in the young. An individual that measured five- 

 eighths of an inch in length, was a quarter of an inch 

 broad : specimens are recorded as measuring an inch in 

 length, with a proportionate width. 



The animal is very dusky, and shorter-footed in pro- 

 portion to its shell than the neighbouring species. 



It is one of our scarcer fresh water shells. It occurs in 

 still waters. It occurs in several of our southern counties, 

 especially Wilts and Somerset. Penzance (N. T. Miller) ; 

 Staffordshire; in marshes on the sea-coast near Swansea; 

 Cardiff; Manorbeer (Jeffreys) ; York, in small ditches, 

 but rare (T. Hincks) ; Clitheroe (Reece). Not uncommon 

 near Newcastle (Alder). Rare in Ireland ; Belfast (W. 

 Thompson) ; Cork (Humphreys). 



L. palustris, Linnaeus. 



Ovate-oblong, usually purplish-brown ; spire conic, about as 

 long as the mouth ; whorl simply rounded not abruptly divided ; 

 body whorl, not suddenly larger, throat usually coloured ; outer 

 lip not spreading. 



Plate CXX IV. fig. 2. 



Buceinum pulustre, MuLLEB, Verm. Ter. ct Fluv. vol. ii. p. 131. — Sciirot. 



Fliissconeh. pi. 7, f. 9, 10. 



Helix- stagnalis, vat: /3. Penn. Brit. Zool. ed. 4, vol. iv. p. 139, pi. 8G, f. 136, B 



(teste Mont.). 



„ palustris, Gmel. Syst. Nat. p. 3658. — Pii.t. Hutchins, Hist. Dorset, p. 4!). 



—Mont. Test. Brit. p. 370, pi. 10, f. 10; Suppl. p. 138.— 



Maton and Rack. Trans. Linn. Soc. vol. viii. p. 216, pi. 5, 



f, 8. — Rack. Dorset Catalog, p. 55, pi. 18, f. 18 (not well).— 



